package adv3;

public class Shuxue2 {

	public static void main(String[] args) {
		System.out.println(Math.floor(11.5));
		System.out.println(Math.floor(-11.5));// -12

		System.out.println(Math.ceil(11.5));// 12
		System.out.println(Math.ceil(-11.5));// -11
	}
}
